Explore 23,508 Species
Yellow-flowered Cryptantha
Oreocarya confertiflora Greene
Oreocarya confertiflora is an erect perennial desert herb native to the southwes…
Miner's Candle
Oreocarya virgata (Porter) Greene
Miner's candle Oreocarya virgata is a white-flowered biennial herb native to Wyo…
Parry's goldenrod
Oreochrysum parryi (A.Gray) Rydb.
Oreochrysum parryi, Parry's goldenrod, is the only species in the Asteraceae gen…
Longpedicel Woodnettle
Oreocnide pedunculata (Shirai) Masam.
Oreocnide pedunculata is an Urticaceae flowering shrub/tree native to East Asia,…
highland rush
Oreojuncus trifidus (L.) Záv.Drábk. & Kirschner
Oreojuncus trifidus is a perennial amphi-atlantic rush native to arctic, alpine …
Mountain Parsley
Oreoselinum nigrum Delarbre
Tundra Aster
Oreostemma alpigenum (Torr. & A.Gray) Greene
Oreostemma alpigenum is a perennial/subshrub in Asteraceae from western US mount…
Oregano
Origanum vulgare L.
Origanum vulgare L., commonly oregano, is a herb related to marjoram with key gr…
Large-flowered Orlaya
Orlaya grandiflora (L.) Hoffm.
Orlaya grandiflora (white laceflower) is an Apiaceae annual native to Mediterran…
Divergent Star-of-Bethlehem
Ornithogalum divergens Boreau
Ornithogalum divergens Boreau is a bulbous flowering plant native to a broad ran…
Narbonne Star-of-Bethlehem
Ornithogalum narbonense L.
Ornithogalum narbonense is a bulbous flowering plant native to the Mediterranean…
Drooping Star-of-Bethlehem
Ornithogalum nutans L.
Drooping star-of-Bethlehem (Ornithogalum nutans) is a bulbous perennial flowerin…
Chincherinchee
Ornithogalum thyrsoides Jacq.
Ornithogalum thyrsoides Jacq. is a winter-dormant perennial flowering plant that…
common star-of-Bethlehem
Ornithogalum umbellatum L.
Ornithogalum umbellatum is a toxic bulbous geophyte used as an ornamental, with …
Orange Bird's-foot
Ornithopus pinnatus (Mill.) Druce
Ornithopus pinnatus (orange birdsfoot) is a Fabaceae plant native to Western Eur…
Baja California birdbush
Ornithostaphylos oppositifolia (Parry) Small
Ornithostaphylos oppositifolia is a rare burl-forming woody plant native to sout…
Thyme Broomrape
Orobanche alba Steph. ex Willd.
Orobanche alba is a short parasitic annual that infects mint family plants, flow…
Nodding Broomrape
Orobanche cernua Loefl.
Orobanche cernua, the nodding broomrape, is a holoparasitic herb growing up to 0…
Bean Broomrape
Orobanche crenata Forssk.
Orobanche crenata, or bean broomrape, is a chlorophyll-less parasitic plant that…
ivy broomrape
Orobanche hederae Duby
Orobanche hederae Duby, or ivy broomrape, is a parasitic plant that grows on ivy…
Common Broomrape
Orobanche minor Sm.
Orobanche minor Sm., common broomrape, is a parasitic perennial herb native to S…
Hairy Broomrape
Orobanche pubescens d'Urv.
Orobanche pubescens is a self-supporting annual herb in Orobanchaceae that grows…
greater broomrape
Orobanche rapum-genistae Thuill.
Orobanche rapum-genistae (greater broomrape) is a chlorophyll-free perennial par…
Golden Club
Orontium aquaticum L.
Orontium aquaticum (golden-club) is the only living species in the Orontium genu…
